基于Simulink的数字锁相环调频器研究与设计

The Study and Design on Digital PLL Frequency Modulator Based on Simulink

现代通信系统,广泛地将锁相环应用在调频和解调技术上.鉴相器、环路低通滤波器、压控振荡器构成锁相环的主体.本文运用Matlab提供的Simulink仿真平台,直观地搭建出数字锁相环调频和解调器仿真图,验证了数字锁相系统的闭环信号跟踪特性.

Technology of phase-locked loop is widely used on frequency modulation and demodula tion in the area of modern communications. A phase-locked loop contains mainly a phase detector, a low pass filter of loop, and a voltage-controlled oscillator. This thesis, making use of Simulink in MAT LAB, constructs visually digital phase-locked loop simulation models of frequency modulator and demod ulator and verifies the characteristic of following signals in digital phase-locked loop systems.